Animation node - sorting a collection of objects from their size
I think we can do it in 4 steps :

Set up a loop to extract the size of each object. Since the "size" can be subjective, I calculated the length of the vector resulting from the object's dimensions (Bounding box).



Next, sort the list and use the sorted indices to get the object list sorted by size.



Finally, make the objects appear with a delay in a loop, in the correct order.



The main loop :



Result :